[petsc-users] Installing PETSc in Ubuntu 24.04 - check test error

[Barry Smith]

   This is fine. Just an over-enthusiastic compiler 

   Barry


> On Sep 3, 2024, at 9:43 PM, Bodhinanda Chandra <bodhinandach at gmail.com> wrote:
> 
> Dear PETSc community,
> 
> I recently tried to install PETSc in Ubuntu 24.04. All seems to work fine, but one of the check tests ex5f thow the following errors:
> 
> ----------------------------------------------------------------------------------------------------
> 
> Running PETSc check examples to verify correct installation
> Using PETSC_DIR=/home/bchandra/Program/petsc and PETSC_ARCH=arch-linux-c-opt
> C/C++ example src/snes/tutorials/ex19 run successfully with 1 MPI process
> C/C++ example src/snes/tutorials/ex19 run successfully with 2 MPI processes
> C/C++ example src/snes/tutorials/ex19 run successfully with HYPRE
> *******************Error detected during compile or link!*******************
> See https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!aWfx77pFkinEWnfZuOJV9iSUGz1PtCHOLEjTdL_APZHj6LB9f3z5sn2XDepCVrIL3IqhVVJH51ih6RUxgdeFsJ0$  <https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!bNBtvML4qAKu9WGzBH2kRjtiP8AwN3ijY4qZngu7nvl_TUwz8pQ6WGyCJh0AtIEOqLHU5NHUJRL1oWg2FeTR0Oz6868$>
> /home/bchandra/Program/petsc/src/snes/tutorials ex5f
> *********************************************************
> /usr/local/openmpi-4.1.5/bin/mpif90 -fPIC -Wall -ffree-line-length-none -ffree-line-length-0 -Wno-lto-type-mismatch -Wno-unused-dummy-argument -Wall -ffree-line-length-none -ffree-line-length-0 -Wno-lto-type-mismatch -Wno-unused-dummy-argument -O3 -march=native -mtune=native   -I/home/bchandra/Program/petsc/include -I/home/bchandra/Program/petsc/arch-linux-c-opt/include -I/usr/local/openmpi-4.1.5/include     ex5f.F90  -Wl,-rpath,/home/bchandra/Program/petsc/arch-linux-c-opt/lib -L/home/bchandra/Program/petsc/arch-linux-c-opt/lib -Wl,-rpath,/usr/local/openmpi-4.1.5/lib -L/usr/local/openmpi-4.1.5/lib -Wl,-rpath,/usr/lib/gcc/x86_64-linux-gnu/13 -L/usr/lib/gcc/x86_64-linux-gnu/13 -lpetsc -lHYPRE -lflapack -lfblas -lm -lX11 -lmpi_usempif08 -lmpi_usempi_ignore_tkr -lmpi_mpifh -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -lquadmath -o ex5f
> ex5f.F90:439:52:
> 
>   439 |       PetscInt  row,col(5),i,j,i1,i5
>       |                                                    ^
> Warning: ‘col[1]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:439:52: Warning: ‘col[2]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:439:52: Warning: ‘col[3]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:476:83:
> 
>   476 |                call MatSetValuesLocal(jac,i1,[row],i1,[col],[v],INSERT_VALUES,ierr)
>       |                                                                                   ^
> Warning: ‘col[4]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:439:52:
> 
>   439 |       PetscInt  row,col(5),i,j,i1,i5
>       |                                                    ^
> note: ‘col[4]’ was declared here
> ex5f.F90:476:83:
> 
>   476 |                call MatSetValuesLocal(jac,i1,[row],i1,[col],[v],INSERT_VALUES,ierr)
>       |                                                                                   ^
> Warning: ‘v[1]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:440:58:
> 
>   440 |       PetscScalar two,one,hx,hy,v(5)
>       |                                                          ^
> note: ‘v[1]’ was declared here
> ex5f.F90:476:83:
> 
>   476 |                call MatSetValuesLocal(jac,i1,[row],i1,[col],[v],INSERT_VALUES,ierr)
>       |                                                                                   ^
> Warning: ‘v[2]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:440:58:
> 
>   440 |       PetscScalar two,one,hx,hy,v(5)
>       |                                                          ^
> note: ‘v[2]’ was declared here
> ex5f.F90:476:83:
> 
>   476 |                call MatSetValuesLocal(jac,i1,[row],i1,[col],[v],INSERT_VALUES,ierr)
>       |                                                                                   ^
> Warning: ‘v[3]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:440:58:
> 
>   440 |       PetscScalar two,one,hx,hy,v(5)
>       |                                                          ^
> note: ‘v[3]’ was declared here
> ex5f.F90:476:83:
> 
>   476 |                call MatSetValuesLocal(jac,i1,[row],i1,[col],[v],INSERT_VALUES,ierr)
>       |                                                                                   ^
> Warning: ‘v[4]’ may be used uninitialized [-Wmaybe-uninitialized]
> ex5f.F90:440:58:
> 
>   440 |       PetscScalar two,one,hx,hy,v(5)
>       |                                                          ^
> note: ‘v[4]’ was declared here
> Fortran example src/snes/tutorials/ex5f run successfully with 1 MPI process
> Completed PETSc check examples
> 
> ----------------------------------------------------------------------------------------------------
> 
> Any ideas what happened and how to fix it? Many thanks in advance.
> 
> Kind regards,
> Nanda

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